I like #17. Thanks.
#19 and #20 look more appropriate for commercial real estate. We only do residential homes. So, I don't think those will work.
A couple of my colleagues like your #3 and #17 the best. My concern is that it is not as "professional" and "high-end" as we would like. We need to strike the balance on "approachable" and "professional."
Also, can you make the tree a little bit more like a tree. It sort of looks like a pea vine.
Nice work. :-)